What have you done to your square lately??

[Ajax19]

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[Grit dog]

Something makes me think this could be it. This video randomly popped in to my Y Toob feed and it seems likely what my truck has going on. It's just a guy talking but what he shows you is what I will be looking for when I finally do swap out tank and fuel pumps.https://youtu.be/a8ksy3kEaHs?si=qmm8FBnwPoFBKqJV

To @bucket reasoning, I haven’t run a TBI Chevy for almost 30 years and never lost a fuel pump in any TBI I had or in the fleet. But post TBI era I’ve experienced several high pressure gas fuel pump failures. Vehicle and boats. Mostly GM. And the common theme was they all failed suddenly and completely. So I’d trust his experience over mine.

 

[Grit dog]

Bought a fuel filter to see which attachments I could use on the truck with the pressure tester guage I borrowed: a Betooll 0-140 psi kit. Nothing fits GM TBI from it. Does anyone have an affordable, or reliable definite go to kit they recommend that has an attachment to test GM TBI?

I don’t. And per my previous post it’s been a long time since I’ve laid eyes on a TBI. Is there no Schrader valve to connect to?

 

[Ricko1966]

I don’t. And per my previous post it’s been a long time since I’ve laid eyes on a TBI. Is there no Schrader valve to connect to?

No Schrader on tbi,you have to add a fitting before the throttle body or at or instead of the fuel filter.